ASTM B910/B910M-07

Standard Specification for Annealed Copper-Clad Steel Wire

ABSTRACT
This specification covers annealed bare round copper-clad steel wire for the following applications: electrical, electronic, grounding, telecommunications, and other applications. Four types of copper-clad steel wires according to their electrical conductivities are included. The wire shall consist of a core of homogeneous open-hearth, electric-furnace, or basic-oxygen steel with a continuous outer cladding of copper thoroughly bonded to the core throughout. The copper-clad steel wire shall conform to the specified requirements for: tensile strength, elongation, dimension (diameter), adhesion and surface defects, joints, finish, copper thickness, density, and electrical resistivity. Methods for measurement, inspection, and testing such as torsion (twist) test are detailed.
SCOPE
1.1 This specification covers bare round copper-clad steel for the following applications: electrical, electronic, grounding, telecommunications, and other applications.
1.2 Four conductivities are covered as follows: 21, 30, 40, and 70 %.
1.3 Temper is designated as annealed.
1.4 The values stated in inch-pound or SI units are to be regarded separately as the standard. Each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. For conductor sizes designated by AWG, the requirements in SI units have been numerically converted from corresponding values stated or derived in inch-pound units. For conductor sizes designated by SI units only, the requirements are stated or derived in SI units.
The following precautionary statement pertains to the test method portion only, Section , of this specification: This standard does not purport to address all of the safety concerns, if any associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 30-Sep-2007
• ICS: 77.140.65 - Steel wire, wire ropes and link chains
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.06 - Bi-Metallic Conductors

Relations

• Replaces: ASTM B910/B910M-06 - Standard Specification for Annealed Copper-Clad Steel Wire
• Effective Date: 01-Oct-2007
• Replaced By: ASTM B910/B910M-07(2013) - Standard Specification for Annealed Copper-Clad Steel Wire
• Effective Date: 01-Apr-2013
• Referred By: ASTM B228-11a(2021) - Standard Specification for Concentric-Lay-Stranded Copper-Clad Steel Conductors
• Effective Date: 01-Oct-2007

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: B910/B910M −07
StandardSpecification for
1
Annealed Copper-Clad Steel Wire
This standard is issued under the fixed designation B910/B910M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope SectionalAreasofAWGSizesofSolidRoundWiresUsed
as Electrical Conductors
1.1 This specification covers bare round copper-clad steel
3
2.3 NIST Document:
forthefollowingapplications:electrical,electronic,grounding,
NBS Handbook 100 -Copper Wire Tables
telecommunications, and other applications.
1.2 Four conductivities are covered as follows: 21, 30, 40,
3. Ordering Information
and 70%.
3.1 Ordersformaterialunderthisspecificationshallinclude
1.3 Temper is designated as annealed.
the following information:
3.1.1 Quantity of each size;
1.4 The values stated in inch-pound or SI units are to be
3.1.2 Wire size: diameter in inches (see 5.2);
regarded separately as the standard. Each system shall be used
3.1.3 Conductivity (see Table 1);
independently of the other. Combining values from the two
3.1.4 Wire to be used for redraw or not;
systems may result in nonconformance with the specification.
3.1.5 Packaging and shipping (see 10); and
ForconductorsizesdesignatedbyAWG,therequirementsinSI
3.1.6 Place of inspection (see 6.1).
units have been numerically converted from corresponding
values stated or derived in inch-pound units. For conductor
4. Material
sizesdesignatedbySIunitsonly,therequirementsarestatedor
derived in SI units. 4.1 The wire shall consist of a core of homogeneous
open-hearth, electric-furnace, or basic-oxygen steel with a
1.5 The following precautionary statement pertains to the
continuous outer cladding of copper thoroughly bonded to the
test method portion only, Section 7, of this specification: This
core throughout and shall be of such quality as to meet the
standard does not purport to address all of the safety concerns,
requirements of this specification.
if any associated with its use. It is the responsibility of the user
of this standard to establish appropriate safety and health
5. General Requirements
practices and determine the applicability of regulatory limita-
5.1 Tensile Strength and Elongation —Thecopper-cladsteel
tions prior to use.
wireshallconformtothetensilestrengthrequirementsofTable
2. Referenced Documents 2. Because there are many carbon steel and copper thickness
combinations available, the desired tensile strength should be
2.1 The following documents of the issue in effect on the
agreed upon between the purchaser and manufacturer prior to
dateofmaterialpurchaseformapartofthisspecificationtothe
placing an order. The elongation shall be 15.0% minimum for
extent referenced herein:
all diameters listed in 5.2.
2
2.2 ASTM Standards:
5.2 Dimensions—The wire size range for this specification
B193Test Method for Resistivity of Electrical Conductor
shall be from 0.0253 (0.643 mm) to 0.2294 in. (5.827 mm)
Materials
diameter (see Note 1).
B258 Specification for Nominal Diameters and Cross-
5.2.1 Permissible Variations—The wire sizes shall meet the
following tolerances:
5.2.1.1 For diameters 0.1000 in. (2.54 mm) and over, the
1
This specification is under the jurisdiction of ASTM Committee B01 on
wireshallnotvaryfromthespecifieddiameterbymorethan 6
Electrical Conductors and is the direct responsibility of Subcommittee B01.06 on
1
Composite Conductors.
1 ⁄2 %, expressed to the nearest 0.0001 in. (0.003 mm).
Current edition approved Oct. 1, 2007. Published October 2007. Originally
5.2.1.2 Fordiametersunder0.1000in.(2.54mm)andabove
approved in 2000. Last previous edition approved in 2006 as B910/B910M–06.
0.0253 in. (0.643 mm), the wire shall not vary from the
DOI: 10.1520/B0910_B0910M-07.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from National Institute of Standards and Technology (NIST), 100
the ASTM website. Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http://www.nist.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
B910/B910M − 07
TABLE 1 Density (nom.) and Resistivity, (max.), at 20°C (Nominal in cross section. A complete discussion of this subject is contained in
Conductivity, Minimum Conductivity, and Nominal Density for
NBSHandbook100. The use of five significant figures in expressing
Reference Only) resistivity does not imply the need for greater accuracy
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:B910/B910M–06 Designation: B 910/B 910M – 07
Standard Specification for
1
Annealed Copper-Clad Steel Wire
This standard is issued under the fixed designation B 910/B 910M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This specification covers bare round copper-clad steel for the following applications: electrical, electronic, grounding,
telecommunications, and other applications.
1.2 Four conductivities are covered as follows: 21, 30, 40, and 70 %.
1.3 Temper is designated as annealed.
1.4 The values stated in inch-pound or SI units are to be regarded separately as the standard. Each system shall be used
independently of the other. Combining values from the two systems may result in nonconformance with the specification. For
conductor sizes designated by AWG, the requirements in SI units have been numerically converted from corresponding values
stated or derived in inch-pound units. For conductor sizes designated by SI units only, the requirements are stated or derived in
SI units.
1.5 The following precautionary statement pertains to the test method portion only, Section 7, of this specification: This
standard does not purport to address all of the safety concerns, if any associated with its use. It is the responsibility of the user
of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior
to use.
2. Referenced Documents
2.1 The following documents of the issue in effect on the date of material purchase form a part of this specification to the extent
referenced herein:
2
2.2 ASTM Standards:
B 193 Test Method for Resistivity of Electrical Conductor Materials
B 258 Specification for Standard Nominal Diameters and Cross-Sectional Areas of AWG Sizes of Solid Round Wires Used as
Electrical Conductors
3
2.3 NIST Document:
NBS Handbook 100 - Copper Wire Tables
3. Ordering Information
3.1 Orders for material under this specification shall include the following information:
3.1.1 Quantity of each size;
3.1.2 Wire size: diameter in inches (see 5.2);
3.1.3 Conductivity (see Table 1);
3.1.4 Wire to be used for redraw or not;
3.1.5 Packaging and shipping (see 10); and
3.1.6 Place of inspection (see 6.1).
4. Material
4.1 Thewireshallconsistofacoreofhomogeneousopen-hearth,electric-furnace,orbasic-oxygensteelwithacontinuousouter
cladding of copper thoroughly bonded to the core throughout and shall be of such quality as to meet the requirements of this
specification.
1
This specification is under the jurisdiction of ASTM Committee B01 on Electrical Conductors and is the direct responsibility of Subcommittee B01.06 on Composite
Conductors.
Current edition approved MarchOct. 1, 2006.2007. Published March 2006.October 2007. Originally approved in 2000. Last previous edition approved in 20042006 as
B910/B910M-04.B 910/B 910M – 06.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from National Institute of Standards and Technology (NIST), 100 Bureau Dr., Stop 3460,1070, Gaithersburg, MD 20899-3460.20899-1070, http://
www.nist.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
B 910/B 910M – 07
TABLE 1 Density (nom.) and Resistivity, (max.), at 20°C (Nominal
Conductivity, Minimum Conductivity, and Nominal Density for
Reference Only)
Maximum Resistivity
Nominal Density at 20°C
Nominal Minimum
Conductivity (ohm Conductivity
3 3 2
(% IACS) lb/in. (g/cm ) Ohm cmil/ft mm /m) (% IACS)
21 0.2885 (7.99) 54.58 (0.0974) 19.00
21 0.2885 (7.99) 54.58 (0.0907) 19.00
30 0.2944 (8.15) 35.26 (0.0586) 29.41
40 0.2975 (8.24) 26.45 (0.0439) 39.21
40 0.2975 (8.24) 26.45 (0.0440) 39.21
70 0.3098 (8.58) 15.96 (0.0265) 65.00
5. General Requirements
5.1 Tensile Strength and Elongation —The copper-clad steel wire shall conform to the tensile strength requirements of Table
2. Because there are many carbon steel and copper thickness combinations available, the desired tensile strength should be agreed
upon between the purchaser and manufacturer prio
...